i have a 96 cougar that is a V engine code which is a DOHC engine followed by a 3:27 rear end, i have added a flowmaster exhaust, MSD ignition, K&N cold air intake, and super chip, the stock engine made about 280 horse, i'm thinking i have about 305 or so, but i'm not sure............but i have went through the thing inside and out, if you need any help trouble shooting your 4.6L engine, let me know